Apples and oranges. :-) The G2 mesh is a few thousand polys denser than the G1 mesh, so it can be more detailed. (But not as detailed as the 3rd and 4th gen high res meshes are) The "gender split" between G2F and G2M allows more exact weightmapping and JCMs, and makes cloth creation easier. The "HD" morphs are a new technology that allows to actually morph the subdivided G2 mesh, so it can be as detailed as your computer allows. (And actually much more detailed than the 3rd or 4th gen meshes) So, G2 is more detailed than G1, but less detailed than V3, M3, V4. M4 etc. But G2 + HD morphs is much more detailed than V3, V4, M3, M4. etc.